"I use a retouching varnish which is made in France, Libert, and that's all the varnish I use"

This quote by Edward Hopper talks to his commitment to his craft and his commitment to using the best materials available. He is describing a retouching varnish made in France, Libert, which he uses exclusively. This suggests that he has done his research and has actually found that this particular varnish is the very best for his purposes. He is not happy to compromise on quality, and is willing to go the extra mile to discover the very best materials for his work. This speaks with his commitment to quality and his devotion to producing the very best possible art work. He is not willing to choose anything less than the very best, and this is shown in the quality of his work. His dedication to utilizing the best products available is a testimony to his devotion to his craft and his commitment to creating the highest quality artwork.